An electron can be added to a halogen atom to form a halide ion with?
8 valence electrons
7 valence electrons
2 valence electrons
3 valence electrons
Correct answer is A
A halide ion is a halogen atom bearing a negative charge (which is an anion with a charge of -1). The halide anions are fluoride (F−), chloride (Cl−), bromide (Br−), iodide (I−) and astatide (At−).